使用GROUP BY檢索滿足條件的記錄

Question

我只想從幾千條記錄中選擇計數大於1（換句話說是重複記錄）的行，現在我幾乎看到1s和幾個2s和3s在這裏和那裏

SELECT count(*) AS `Number` , GI . * 
FROM `GeneralInformation` AS GI 
GROUP BY `FirstName` , `Surname` 

我該怎麼做？

Answer 1

SELECT count(*) AS `Number` , GI . * 
FROM `GeneralInformation` AS GI 
GROUP BY `FirstName` , `Surname` 
HAVING count(*)>1 

Answer 2

使用HAVING子句

SELECT count(*) AS `Number` , GI . * 
FROM `GeneralInformation` AS GI 
GROUP BY `FirstName` , `Surname` 
HAVING count(*) > 1